Add missing input validation. This could result in reading from uninitialized memory. The issue was found by OSS-Fuzz for usrsctp  and reported in https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17780
Add missing input validation. This could result in reading from
uninitialized memory.
The issue was found by OSS-Fuzz for usrsctp  and reported in
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=17780

sctplab/stream-reset-improved,sctplab/stream-reset-improved